Hydraulic motor



G. MAcFETRIDGE.

HYDRAULIC MOTOR.

APPLICATION FILED FEB. 16, 1920.

1,3 0,965; Patented Nov; 30,1920.

3 SHEETS-SHEET I- a. MAcFETRfDGE. HYDRAULIC MOTOR.

APPLICATION FILED FEB. 16, 1920- 1,360,965. Patehted Nov. 30, 1920.

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HYDRAULIC MOTOR.

APPLICATION FILED FEB. 16, 1920.

1 ,360,965. Patented Nov. 30, 1920.

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A UNITED STATES;

PMATENT OFFICE.

GEORGE MACFETRTDGE, OF FHILADELPHIA, PENNSYLVANIA.

HYDRAU IC Moron.

Specification of Letters Patent. Patnted N 30 192() .Application filed February 16, 1920. Serial No. 359,157.

a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in Hydraulic Motors, of which the following is a specification.

This invention relates to hydraulic motors i embodying a plurality of cylinders and'pistons, the latter being connected at regular intervals to a power-shaft and actuating by their movement an organization of elements controlling the admission of water into the respective cylinders and to relievethe respective cylinders from water pressure. The

present invention relates to apparatus of the same general type asthat disclosed in my.

Patent Number 835,310, granted November 6, 1906, and wherein the pistons are so connected to the power shaft as tooverconie any tendency to dead-center and'by reason of the manner in which they are connected with said shaft will operate to'turn said shaft so long as chargesof'water areadmitted to the cylinders.

i The objects of this present'invention are to provide a structure having improved means for admitting the charges of water to the cylinders and relieving the water pressure in the cylinders whereby higher power and greater etiiciency may be obtained.

With the above and other objects in view, my invention consists in certain features of structure, combination, and relationwhich iwill be more fully set forth hereinafter.

I have illustrated one embodiment of my invention in the accompanying drawings, wherein:'- I

Figure 1 is a top plan view of a motor .constructed in accordance with'my 111VQI1' Fig. .3 is a; longitudinal verticalsection taken at the end of the piston stroke.

Fig. 1 is a transverse vertical section-taken in diflerent planes through the respective units of the apparatus.

Referring to the drawings wherein similar numerals denote like parts throughout'the several views My improved motor comprises-a base 1 which supports a: reservoir2, this reservoir being connected to any suitable source of water supply, (not shown), and is provided with a plurality of water inlets 3, one for each cylinder of the engine, and whichv are of relatively great transverse width so as to permit of a large flow of water therethrough and are provided with sliding gate valves 1.

In each of the cylinders, which are similar in structure, water is admitted through inlet 3 to thecylinder 5. Cylinder 5 is provided with a rigidly fixed head 6 and has a slidable bottom portion 7 which operates upon partial withdrawal from the cylinder to provide a relief opening or outlet for the water operating within the cylinder.

A piston 8 is adapted to reciprocate in the cylinder, this piston being connected to a rod 9 which extends through an opening in cylinder end 6 and is connected to crosshead '10, this cross-head being slidably mounted in cross-head guides 11. Crosshead 10 is connected by connecting rod 11 to crank 12 of the power shaft 13, cranks 12 being fixed to shaft 13 in variousaiigular positions, as illustrated in Figs. 1 and 2.0f the drawings, whereby any tendency of the apparatus to balance and stop on deadcenter is obviated.

The valve operating mechanism includes a striker arm' 14: keyed to piston rod 9. A rod-15 conn cted at one end to the slidable cylinder bottom 7 and slidably mounted at the other end in a standard 16 mounted on base 1 carries striker block 17 which is adapted to be engaged by the lower end of arm let whereby when the piston has completed its operative stroke the sliding bottom of the cylinder is drawn out to open the bottom of the cylinder for the egress of the water, (as illustrated in Fig. 3 of the drawings) standard 16 serving as a stop to limit the movement of block 17.

Inlet valve 4 is actuated through means of a jointed or hinged rod 18 mounted to slide instandard 19 carried by the cylinder and'which carries striker blocks 20 and 21.

The free end of rod 18 is provided witha roller or wheel 22 which travels in a runway 23 on the inclined member 2 1. Strikeruntil the-cylinder bottom is closed 24, striker block 21 is lifted out of engagement with striker arm 14, and at the same time the lower portion of striker arm 14 en gages with striker block 17 on rod 15 and partially withdraws the sliding bottom 7 from the cylinder and permitting the water in the cylinder to escape. In the apparatus shown, when the alternate pistons start upon their positive stroke, piston rod 9 will be forced back through means of crank 13,connecting slideway 11 and cross-head 10. As the striker arm 14 is carried back it passes under block 21 and nearthe end of its return stroke engages striker block and the outer end of sliding bottom member 7 of the cylinder, which member it forces back 7 inlet valve in open position.

In the operation of my device, when at rest the inlets of. two of the cylinders of my apparatus will be open, two closed and the other in either opening or closing position.

lVater under pressure is admitted to the reservoir, whereupon the p1stons 1n the open 25 V the end of the piston stroke is reached, two

cylinders will start upon their stroke. WVhen of the remaining cylinders and pistons will be in operation, the water inlets and outlets being actuated by the striker arm carried by the piston rod as aforesaid and the motor will eontinuein operation until the supply of water is 'cut off.

7 I clain1 V .1. In a fluid motor, a cylinder having a piston adapted to reciprocate therein and a piston rod, said cylinder provided with a sliding bottom portion constituting apart of the inner cylinder wall adapted to funcrod and the power shaft, a reservoir adapt.-

ed to receive fluidunder pressure, a valve between said reservolr and said cylinder, av striker arm carried by said piston rod, and.

means connected. to said valve and said slid-v ing bottom portion ofthe' cylinder adapted to cooperate with said striker arm to autoimatlca-lly eontrolythe admission and dis-- charge of the operating fluid.

3. In a fluid motor, a cylinder, piston and piston rod therefor, said cylinderprovided with a sliding bottom portion constituting apart of the inner cylinder wall and adaptand -th e positions 0 ed to serve as an outlet valve, apower shaft, connections between the piston rod and said power shaft, a reservoir adapted to receive fluidunder pressure, a slide valve between said reservoir and the cylinder, a. striker arm carried by the piston rod, a'valve operating rod connected to said slide valve, strikerblocks mounted on said valve operating rod, an operating rod secured to said sliding bottom portion, striker blocks secured to said last named rod, said striker blocks being adapted to cooperate with said striker arm for operating said valves and means for disconnecting said first named striker blocks from the striker arm when said valve is closed. V '7 4-. In a hydraulicmotor, a cylinder provided with a slidable bottom portion constituting the lower wall thereof-andadapted to operate as an outlet valve, a piston in said cylinder, a piston rod for said piston, a

power shaft, connections between said piston rod and said power shaft, a reservoir communicating with said cylinder and adapted to receive fluid under pressure, a slide valve between said reservoir and said cylinder and adapted to control the admission of operating fluid to said" cylinder, a striker arm carried by said piston rod, a

valve operating rodconne'cted to said slide valve, a pair of striker blocks mounted on said valve operating'rod and adapted to engage the striker arm carried by said piston rod, a longitudinally reoiprocable rod secured to said sliding bottom portion, a

striker block mounted on said last-named rod, a roller journaled in theifree end of said valve operating rodfand an inclined runway mounted adjacent said cylinder and adapted to cooperate with the roller endof said valve 0 aerating rod whereby at certain the piston one "of the striker blocks on said valve operating rod is lifted out of engagement with the striker arm on the piston rod. Y

5. In a. fluid motor, a horizontally disposed cylinder having a longitudinal opening in the bottom thereof, a sliding outlet valve constituting the bottom wall of the cylinder and adapted to close said opening, a piston rod connected to said piston, a cross head connectedto said piston rod, guides for said cross heads, a reservoiradapted to re-.

ceive fluid under. pressure, a valve, between saidreservoir and said cylinder, a valve operating rod connected to said valve, and an operating rod connected to said sliding outlet valve, a striker arm carried by said piston rod,.means carried by said valve operating rod, and means carried by the operating rod secured to saidsliding bottom portion for co-acting with said striker arm for automatically controlling the admission and discharge-of the operating fluid.

' 6. In, a fluid motor," a;base, a cylinder mounted on said base, a reservoir for fluid under pressure, said reservoir communicating with the cylinder and adapted to supply operating fluid thereto, a piston in said cylinder having a piston rod connected thereto, a slide valve adapted to control the admission of fluid to the cylinder, a hinged valve operating rod connected to said slide valve, a roller in the free end of said valve operating rod, means carried by said piston rod adapted to periodically actuate said valve operating rod whereby admission of fluid to the cylinder is automatically controlled,

means operated by said piston rod for automatically controlling the discharge of fluid from the cylinder, and an inclined run-way positioned above said base and adapted to cooperate with said valve operating rod to disengage said roller end from said first named means.

7 In a fluid motor, a cylinder havin a. piston adapted to reciprocate therein and a. piston rod, inlet and outlet valves associated with said cylinder for controlling the admission and exhaust of motive fluid, a striker arm carried by said piston rod for actuating both of said valves, said inlet valve having an operating rod provided with a hinged end, and an inclined run-way cooperating with said hinged end for lifting the same out of contact with said striker arm when said inlet valve is closed.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

GEORGE MAGFETRIDGE.

Witnesses:

CHARLES SANDERSON, HARRIET I. SHARP. 

